/*
 * Copyright (c) 2012 Robert Burrell Donkin robertburrelldonkin.name
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software 
 * is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
package walrus.text.wiki.micro;

import java.nio.CharBuffer;

public class TitleFilter extends AbstractFilter  {
	

	public static TitleFilter filterOnMainTitle(final CharBuffer buffer, final String title) {
		return new TitleFilter(new MicroWikiPullParser(buffer), title, WikiState.TITLE);
	}
	

	private static TitleFilter filter(final String content, final String title, WikiState state) {
		return new TitleFilter(new MicroWikiPullParser(content), title, state);
	}

	public static TitleFilter filterOnMainTitle(final String content, final String title) {
		return filter(content, title, WikiState.TITLE);
	}
	
	public static TitleFilter filterOnSubTitle(final String content, final String title) {
		return filter(content, title, WikiState.SUBTITLE);
	}

	
	public static TitleFilter filterOnSubTitle(final WikiPullParser parser, final String title) {
		return new TitleFilter(parser, title, WikiState.SUBTITLE);
	}

	
	final String title;
	final WikiState target;
	
	boolean matchedTitle;
	

	private TitleFilter(final WikiPullParser parser, final String title, final WikiState target) {
		super(parser);
		this.title = title;
		matchedTitle = false;
		this.target = target;
	}
	
	
	@Override
	protected WikiState processNext(final WikiTracker tracker, final WikiState next) {
		if (next == target) {
			if (tracker.isInTitle()) {
				return next();
			} else {
				matchedTitle = title.contentEquals(text());
				return next();
			}
		} 
		
		if (matchedTitle){
			return next;
		} else {
			return next();
		}
	}


	@Override
	protected void doClear() {
		matchedTitle = false;	
	}


	@Override
	public String toString() {
		return "TitleFilter [" + super.toString() + ", target=" + target
				+ ", title=" + title + "]";
	}	
}

